Well-boring apparatus.



J. B. NORRIS.

WELL BORING, APPARATUS.

KPPLIGATION FILED PEB.24,1912.

Patented Nov. 12

INVENTOB Jaw 0f? 5i Norris.

A Tram/Er WITNES'SES: MW 7 a rosnrri s. scams, or'ooasroana, 'rnxiss, ASSIGNOB or one-HALF r0 rannnmox in.

' unison, or coasrcenn, Texas.

WELL-Bonnie arrsns rus.

essors.

Sheciflcationof Letters Iatenti Application ans February es, 1am. serial no. 57am.

of Texas, have invented certain new and useful Improvements in Well-Boring Apparatus, of which the following is a specification.

This invention relates to new and useful improvements in well boring apparatus, and relates more particularly to that class of apparatus which employs a rotary machine to rotate a drill pipe, said pipecarrying a drill bit on its lower extremity.

The object of the invention is to provide a rotary and a drill, such thatthe grips on the rotary will positively engage the, drill pipe, communicating to it the rotation of a rotary table, through the center of which said pipe passes. a

A further object is to provide. a rotary and drill pipe which will not require the grips to hear against the pi e with any considerable pressure, thus al owing the drill pipe greater freedom to move vertically.

In the well boring apparatus of this class, now in use, grip rings having sharp edges or teeth are adjustably mounted on "a rotatable table, and are adapted. to engage surface of a cylindrical drill pipe. The grip rings impart rotation to said ipe by embeddinga portion of the sharp edges or teeth in the surface of the pipe, which operation soon cuts the surface of the pipe into ggooves and channels, materially weakening the same and causing'it to become unfit for further v use. Dhe grips also slip on the pipe when T harder drilling is encountered, thus doing further damage. The grips furthermore prevent the pipe from feeding down unless a long line of pipe is used, the same providing sufiicient weigt'to cause the rip rings to cut the aforesaid grooves and c annels.

The object is finally toprovide an apparatus which will eliminate these objeotiom able features, and which will be strong, du-.

rahle, comparatively easy to construct, and one in which the various parts are not likely to get out of working order.

With these and various other objects in view, this invention has relatlon to. certain novel features of the construction and operation, an example of which described in the e O er following specification andi unsuited in the accompanying drawing wherein;

Figure 1 1s a plan view of the well sinking apparatus, the pipe being shown in section' lPateutedNovti2d i2e F1g. 2 1s an elevation view of the same as in Fi 1, but with a portion of the table and he plate shown broken away and sectioned, including alsoa section through one of the clamp yokes and grip wheel blocks adjacent to the side of said grip wheel. Fig. 3-is a side elevation of one of the clamp yoltes, as seen on the inside or concave side.

Referring now moreparticularly to the drawings, wherein like reference characters designate like parts in all the figures, the numeral 1 denotes a timber frame work supporting the rotary. -A. bed plate 2-is mounted o-n th'e frame, and has an annular cone-race 3 adapted to receive'the cones 4.

A circular table 5 is provided with a conerace 6 on its under side, adapted to bear on the cones 4. Thetable 5 is also provided flange 8, the inner surface of which is flush with said apezttglre its outer surface slidably engagin the e ges of a concentric aperture" 9 on the ed plate 2. The bevel gear teeth 10 are formed on the under side of the table, and are adapted to mesh with a driving pinion 11 mounted on a driving shaft 12. The driving shaft 12 is adapted to rotate in suitable bearings 1.3, and carries on its outer end a sprocket wheel or other driving means not shown. The upper surface of the table 5 is flat with the exception of two lugs 14 cast on the same, and bored out to receive the vertical driving pins 15. The pins 15 are heldv in the sockets thus formed by setscrews 16, and are drilled in their upper ends for the cotter pins 17. On the table 5 are mounted the clamp yokes .18, having the projecting ends 19 and 20 adapted to engage the driving pins 15, said yokes being also adapted to swing around one of said pins as a pivot when the other pin is withdrawn.

' A cavity 21 of rectangular cross section is provided in the central portion of each yoke 18, and is constr'ucted to receive a grip wheel base'block 22. A grip wheel 23 is rotatably.

mounted in the block 22, and is adapted to rotate on a pin :24. The block 22 is constructed to move in and out of the cavity 21, said movement being controlled by an adjusting 's crew 2 5, threaded in the base of said,

block. The screw 25 passes through an aperture 26 in the yoke casting, and terminates ""in a hand-wheel 27 A set collar 28is providcd on the screw Q5, and bears against the inner wall of the cavity 21, r to take the thrust from the block 22, v

A drill pipe v 29, having, longitudinal grooves/or channels 3 0,adapted to receive '10 the grip wheels 23, is engaged by said grip wheels which hold said pipe in a central position with reference to the? central ape ture 7. Theyalso cause the pipe to rotate as the table on which. they are mounted rotates. The wheels 23 allow the pipe to un- Q. dcrgo a vertical displacement while it is be- Z .ing rotated. The longitudinal grooves or.

,- channels in the-pipe '29 terminate near each lend leaving the ends 31 circular. to receive 20, pipe threads. Only one joint of-the grooved e pipe-would'be necessary in operating the apt, paratus, it being .removed when its upper end reach'esthc rotary and a joint of plain pipe substituted. Thejoint of grooved pipe thus used'would'be strict y a partiof the reufitary. mechanism, being only employed to impart rotation to'the remainder of the drill l-inc which would be composed of the ordianary drill pipe. It is obvious that the form and propou tionof the various parts of this invention may be'changed without departing from the spirit'thereof, and the same is therefore subl anitted-as covering all such modifications 35' come within the scope of the following -clain1s: w A nWhat I claim is:''' i t 5 lw-In a well-boring apparatus, the combination with a rotatable table having a centO- tral aperture ada ited to-receive a drill pipe, of a pair'of bifurcated castings mounted upon said table, one at each side of said-aperture, pipe gripplng n1eans,one of whlch' noaaovs is m'ountedin each of said castings, means for pivotally attaching said castings at their extremities to the table, said means permitting said castings to be turned away froni'the drill pipe to facilitate the removing of the latter.

2. In a well boring apparatus, the combination with a rotatable table, having a central aperture adapted to receive a drill-pipe, of a pair of bifurcated castings one of which is mounted at each side of said aperture, a pipe gripping means mounted in each of said castings, vertical pins mounted on said table-adapted to pivotally engage the ends of said castings, each of said pins being removable to permit a pivotal movement of the castings on the other pin.

3. In a well boring apparatus, the combination with a rotatable table of various forked castings, means for pivotally attach -'vex face, and adjusting screws for moving said base blocks.

4. In a well boring apparatus, the combination with a rotatable table of various castings, and a; drill pipe section provided.

with longitudinal grooves or channels adapted to receive said grip-wheels; I In testimony whereof I have signed my name to this speciu'ication in the presence of two subscribing witnesses. I

JOSEPH B. NORRIS. Witnesses: i

CRAB. R; STEELY, W. CHENEY. 

